The national debt is a singularly bad way of measuring the nation's financial condition. It includes only a small portion of the nation's total liabilities. And it's focused on the past. An honest assessment of the country's projected revenue and expenses over the next generation would show a reality different from the apocalyptic visions conjured by both Democrats and Republicans during the debt-ceiling debate. It would be much worse.

Posturing about whether and how Congress should increase the debt ceiling by Aug. 2 has been a hollow exercise. Failure to increase the borrowing limit would harm American prestige and the global financial system. But that's nothing compared with the real threats to the U.S.'s long-term economic health, which will begin to strike with full force toward the end of this decade: Sharply rising per-capita health-care spending, coupled with the graying of the populace; a generation of workers turning into an outsize generation of beneficiaries

A June analysis by the Congressional Budget Office concluded that keeping the U.S.'s ratio of debt to gross domestic product at current levels until the year 2085 (to avoid scaring off investors) would require spending cuts, tax hikes, or a combination of both equal to 8.3 percent of GDP each year for the next 75 years, vs. the most likely (i.e. "alternative") scenario. That translates to $15 trillion over the next decade -- or more than three times what Obama and Boehner bloviate about.